149584981 has 8 divisors (see below), whose sum is σ = 184104704. Its totient is φ = 118352880.

The previous prime is 149584949. The next prime is 149584991. The reversal of 149584981 is 189485941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149584981 - 2⁵ = 149584949 is a prime.

It is a super-2 number, since 2×149584981² = 44751333081540722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149584901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821805 + ... + 821986.

It is an arithmetic number, because the mean of its divisors is an integer number (23013088).

Almost surely, 2^149584981 is an apocalyptic number.

It is an amenable number.

149584981 is a deficient number, since it is larger than the sum of its proper divisors (34519723).

149584981 is a wasteful number, since it uses less digits than its factorization.

149584981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643811.

The product of its digits is 414720, while the sum is 49.

The square root of 149584981 is about 12230.4938984491. The cubic root of 149584981 is about 530.8388058542.

The spelling of 149584981 in words is "one hundred forty-nine million, five hundred eighty-four thousand, nine hundred eighty-one".